OCEANOGRAPHY

OCEANOGRAPHY
Goal
The Oceanography Sub-program conducts research
to provide scientific and technical advice to other
researchers, government and industry. Jointly,
the areas of physical and biological oceanography
characterise the marine environment through
outcomes that describe the transport and dispersal of
sediments, heat, pathogens, pollutants, nutrients and
marine biota. At the most fundamental level, these
factors influence viruses, bacteria, phytoplankton and
zooplankton that support and underpin the function of
marine ecosystems and ultimately the sustainability of
fish stocks and fisheries.
Hydrodynamic/Biogeochemical Facility
Following world’s best practise, the Oceanography
Sub-program has developed a Hydrodynamic/
Biogeochemical Facility for Australia’s southern
shelves and gulfs that allows us to quantify the
link between ocean circulation and the space-time
dynamics of shelf and gulf planktonic ecosystems. In
addition, the facility allows for the prediction of the
transport of sediments and the dispersal of, prawn and
lobster larval, viruses and pollutants. These models are
supplemented by models for surface waves (SWAN)
and models for Nitrogen Phytoplankton, Zooplankton
and Detritus (NPZD). The model results are used by
government and industry to assist in the sustainable
development of finfish aquaculture within Spencer
Gulf. In addition, the sub-program is undertaking
fundamental research in oceanography of the region
as part of the Great Australian Bight Research
Program.
Southern Australian Integrated Marine Observing
System (SAIMOS)
Shelf data streams for the Hydrodynamic/
Biogeochemical Facility are being collected by the
Oceanography Sub-program through implementation
of the Southern Australian Integrated Marine
Observing System. This observing system is made up
of shelf moorings, ship-based surveys, ocean gliders,
and HF Ocean RADAR. The observing equipment is
deployed in the region of Kangaroo Island and Eyre
Peninsula where significant upwelling of nutrients
occurs. These nutrients provide food for the planktonic
communities that underpin the fisheries and marine
ecosystems of the gulfs and adjacent seas.
Physical Oceanography
The Physical Oceanography team undertakes research
into the dynamics and nature of ocean circulation off
South Australia using analytic, numerical methods and
data analyses. As the physical environment influences
the biological environment a proper understanding
of it is a necessary first step in appreciating how the
plankton responds to the summertime upwelling that
characterises the region.
Biological Oceanography
The Biological Oceanography team conducts
research into the dynamics and ecology of plankton
and planktonic ecosystems across scales from
nanometres to kilometres. Particular focus is given
to the ecological processes of nutrient cycling under
natural and anthropogenic conditions, which underpin
the form and functioning of marine systems. In
collaboration with the Wild Fisheries program, the
group also conducts research into species such as
sardines, prawns, blue crabs and lobster.
Marine Field Services
The Oceanography Sub-program has a nationally
recognised capability in the deployment and
maintenance of costly ocean moorings and Slocum
gliders, as well as in the measurement of nutrients,
plankton abundance and species and primary
productivity.
Staff
The Oceanography Sub-program is led by A/Prof. John
Middleton and its staff include: Drs Mark Doubell, Paul
van Ruth, Ana Redondo, Nicole Patten, John Luick,
Charles James, Mr Paul Malthouse; Visiting Fellows
Prof. Noel James, A/Prof. John Bye; and PhD students
Laura Richardson (graduated) Hugo Bastos d’Oliviera
and Henry Ellis.
Contact:
A/Prof John Middleton
Oceanography Subprogram Leader / SAIMOS
Mooring Facility Leader
Tel: 08 8207 5449
Fax: 08 8207 5481
Email: john.middleton@
sa.gov.au.nospam
www.sardi.sa.gov.au